as a product of its prime factors: 2*3*5*7 = 210
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It's the prime factorization. 2 x 3 x 5 x 7 = 210
Half of 420 is 210. To find half of a number, you divide it by 2. In this case, 420 divided by 2 equals 210. This is because division is the inverse operation of multiplication, and dividing by 2 is the same as multiplying by 0.5.
1 x 210, 2 x 105, 3 x 70, 5 x 42, 6 x 35, 7 x 30, 10 x 21, 14 x 15.
2 x 2 x 3 x 3 x 5 = =180
200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210...yep all 11